<mat-card class="example-card">
    <mat-card-header>
        About me
    </mat-card-header>
    <mat-card-content>
        <br>
        <b>Username</b> {{myUsername}}
        <br>
        <button mat-button color="warning" (click)="logout()"  class="btn btn-success">Logout</button>

    </mat-card-content>
</mat-card>